//
// UnionSecurityTokenResolver.cs
//
// Author:
//	Atsushi Enomoto  <atsushi@ximian.com>
//
// Copyright (C) 2007 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using System;
using System.IdentityModel.Selectors;
using System.IdentityModel.Tokens;
using System.ServiceModel;
using System.ServiceModel.Security;
using System.ServiceModel.Security.Tokens;

namespace System.ServiceModel.Channels
{
	class UnionSecurityTokenResolver : SecurityTokenResolver
	{
		SecurityTokenResolver [] resolvers;

		public UnionSecurityTokenResolver (params SecurityTokenResolver [] resolvers)
		{
			this.resolvers = resolvers;
		}

		protected override bool TryResolveSecurityKeyCore (
			SecurityKeyIdentifierClause keyIdentifierClause,
			out SecurityKey key)
		{
			key = null;
			foreach (SecurityTokenResolver r in resolvers)
				if (r != null && r.TryResolveSecurityKey (keyIdentifierClause, out key))
					return true;
			return false;
		}

		protected override bool TryResolveTokenCore (
			SecurityKeyIdentifier keyIdentifier,
			out SecurityToken token)
		{
			token = null;
			foreach (SecurityTokenResolver r in resolvers)
				if (r != null && r.TryResolveToken (keyIdentifier, out token))
					return true;
			return false;
		}

		protected override bool TryResolveTokenCore (
			SecurityKeyIdentifierClause keyIdentifierClause,
			out SecurityToken token)
		{
			token = null;
			foreach (SecurityTokenResolver r in resolvers)
				if (r != null && r.TryResolveToken (keyIdentifierClause, out token))
					return true;
			return false;
		}
	}
}
